How much time are you willing to put in?
How much money do you need/want/ expect to make for that effort?

Sell what people want at the cheapest price. Repeat over all professions = make money
If you have to rely on the AH for your mats, then that will be a fixed cost. All depends on competition as to whether you cna still supply what people want and there is enough demand so your things will sell.

Have a think about what your strong / unique points are with professions or what you have that other people dont have and then consider if theres demand for it.

Read these forums about what to do with each profession as the same information is repeated time and again.

Use your tailor to do an imperial cloth creation once per day. Turn it into a Greater Cerulian/Pearlescent Spellthread. On my server the mats cost 40g or less, and the spellthread sells every day for 475 to 525 gold.

It's only 450g per day, but for literally 2 min work including logging in and flying between silk farms and halfhill to mail it to the bank alt, it's super quick/easy money.

Use your tailor to do an imperial cloth creation once per day. Turn it into a Greater Cerulian/Pearlescent Spellthread. On my server the mats cost 40g or less, and the spellthread sells every day for 475 to 525 gold.

It's only 450g per day, but for literally 2 min work including logging in and flying between silk farms and halfhill to mail it to the bank alt, it's super quick/easy money.

I'm interested in buying mats on AH then turning them into crafts which nets gold.

Embersilk bags can be good for that, str/agi/int potions as well as flasks are worth checking too
We really cant help you more than telling you which items to check prices for
There may also be some tailoring gear worth crafting for disenchant, i would check wotlk and mop first(and maybe runecloth)

---------- Post added 2013-01-04 at 10:01 AM ----------

Originally Posted by Mudor

Im doing this with royal satchels but I cant seem to sell them :P

Same here, made 4 royal satchel when i got the recipe, i ended up using them myself replacing my 26/26/26/24 bags-.-

Originally Posted by Aquamonkey

Just because Mannoroth and Archimonde are involved doesn't mean it's Legion. They could just be on vacation, demolishing Draenor to build their new summer home.

You cannot trust, nor take seriously, an adult male without facial hair.Boys have no facial hair and boys are not men.
╯°□°）╯︵ ┻━┻

You eill find when you ask questions you get better answers when you supply the relevant information. A lot of making money on the ah is putting in some effort and having an eye for what sells and whats good on your server. If you just wnat some magic beans then you aint gonna make much money no matter how mych advice people provide becayse you have to put it into action. Steady and consistent effort nets the most money over time.

Yeah, that's exactly why I switched to the spellthreads - satchels were way too risky. I don't get the big scores with spellthreads, but I KNOW I'm going to make 400 - 450g every day just for logging in pretty much.

Then why bother making it if after you've made it it's worth less gold :P

Because they are 2 separate markets. You are working on the presumption that you cna achieve sales in both of them and that items have a god given value. Items are worth what people are willing to pay at the time. If he has farmed his own mats then its up to him at what price he sells. Normally I wouldmt make things where I couldnt have added value over and above what the raw mats sell for on the AH, but people have different priorities. Making the sale and getting some gold may be more important than how much profit he makes.